What me worry over proposed gun laws?

Five months ago, the group of homemade gun enthusiasts known as Defense Distributed set out to create a lethal firearm that could be downloaded and 3D-printed entirely from scratch, circumventing all gun control laws. But as new gun bills have been proposed in the wake of recent shootings, creating a bootleg weapon with digital pieces may soon be far easier: As simple as printing a spring-loaded plastic box.

Over the past weekend, Defense Distributed successfully 3D-printed and tested an ammunition magazine for an AR semi-automatic rifle, loading and firing 86 rounds from the 30-round clip.